ガラス転移域で起こるゴム破壊の弾性－粘性転移と速度ジャンプの物理像

DOI Web Site Web Site 参考文献19件

書誌事項

タイトル別名
  • Physical Aspects for Elastic-Viscous Transition and Velocity Jump near Glass Transition Region in Fracture of Rubbers
  • ガラス転移域で起こるゴム破壊の弾性-粘性転移と速度ジャンプの物理像(後編)スティックスリップ振動が生み出す速度ジャンプのメカニズム
  • ガラス テンイイキ デ オコル ゴム ハカイ ノ ダンセイ-ネンセイ テンイ ト ソクド ジャンプ ノ ブツリゾウ(コウヘン)スティックスリップ シンドウ ガ ウミダス ソクド ジャンプ ノ メカニズム
  • （後編）：スティックスリップ振動が生み出す速度ジャンプのメカニズム
  • (the latter half):Mechanism of the Velocity Jump induced by Stick-slip Motion

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抄録

<p>Following the previous first half where the fundamental concept named the elastic-viscous transition phenomenon with velocity jump was introduced, here the authors propose a new physical aspect for the mechanism of the elastic-viscous transition and the velocity jump in comparison with the phase transition of water. The vibrational energy of the stick-slip motion converted from the additional external strain energy works as a driving force to promote the velocity jump keeping a fixed strain energy release rate Gtip. It is quite similar the situation when the latent heat supplied by an external heating source causes a volume jump by keeping the temperature constant in the phase transition of water from liquid to vapor.</p><p>The greatly increased vibrational energy as the crack growth rate increases might be consumed to propagate ductile fractures of the newly induced fraction of the glassy state in the glass transition process from the rubbery to glassy state, resulting in the velocity jump in the transition zone. In this process, the vibration of much higher frequency (a few KHz) generated coupled always with the stick-slip motion may expand the crack tip and initiate cavitation, and hence accelerate the tear fracture drastically ahead of the crack tip in soft visco-elastic rubbers.</p>

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 91 (8), 316-323, 2018

    一般社団法人 日本ゴム協会

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